https://www.chromium.org/developers/androidwebview/webview-ct-bug

In short: on Android N, you need to update Chrome, not WebView.

whoops, sorry, ignore that ^

Chrome version : 55.0.2883.91 its latest from playstore. Issue is not about Android System WebView, i do know Android N we need chrome (I don't think it is duplicate of 680513), issue is about ssl error.

Have you checked the actual URL you're getting in onReceivedSslError? One difference between Chrome and WebView's handling of SSL errors is that Chrome only displays an interstitial if the top-level page has an SSL error; if a subresource (image, iframe, etc) has an SSL error, that subresource is simply not loaded but the rest of the page can be used. WebView calls onReceivedSslError for *all* SSL errors, even for subresources.

So, one possibility is that the HTTPS page you're using is fine, but it embeds a subresource from another HTTPS server whose certificate is bad.

@Torne: I tested, it seems fail at the top-level page. As mentioned above it works on android 6.0 but not 7.1.1. 

any logs from webview?
any repro app (with the source code) I can try and play with? or any page that I can access and try?

without these it is hard for us to help.

A couple more suggestions:

Make sure you read and understand the platform specific changes we made in N. See this page: https://developer.android.com/training/articles/security-config.html#CustomTrust

"By default, secure connections (using protocols like TLS and HTTPS) from all apps trust the pre-installed system CAs, and apps targeting Android 6.0 (API level 23) and lower also trust the user-added CA store by default. An app can customize its own connections using base-config (for app-wide customization) or domain-config (for per-domain customization)."

Ok i have attached a sample app which would help reproduce the issue.

The app, has loadurl button and hits the below server 
https://anilcerttest.cloudapp.net/certtest/home

Step 1: Launch the sample app on Android 6.0 device and Android 7.1.1 device.
Hit Load url, nothing happens and webview remain blank since ssl error is thrown 
Which is expected.

Step 2: Install cert (part of the attachment) on both device.

Step 3: Hit Load Url button again 
On android 6.0 device : you would see webview is updated 
Text displayed is : Cert Tester No certificate from client
This is expected behavior (ignore the text, server checks if client provided cert)

On android 7.1.1 device: we still receive ssl error and webview is blank. 

Deleted: Sampleapp.zip 8.8 MB

Sampleapp.zip 8.8 MB Download

Thanks for the repro case, I will look at it. 

did you read my comments in #7 by the way? Did you try it in your application?

In particular, try this, if you want to trust user certs, but it is better to customize the cert you trust only to the one you add.

<network-security-config>
    <base-config>
        <trust-anchors>
            <certificates src="user"/>
            <certificates src="system"/>
        </trust-anchors>
    </base-config>
</network-security-config>

Got it, i see the when app target version was set to 24 user installed CA is not considered, adding the above xml fixed the issue. Thanks.